Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
  • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
  • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
  • F16L55/164—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing fluid being introduced in the pipe
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49718—Repairing
  • Y10T29/49746—Repairing by applying fluent material, e.g., coating, casting

Definitions

• the invention relates to a method for the rehabilitation of pipelines, internal linings removed in the pipeline by flowing abrasives and with a viscous, hardening coating material to be coated on the inside.
• Pipelines are already installed pipes that are gas, steam or Fluid.
• it can be feed and / or drain lines act for water or gas in residential, industrial and municipal facilities, including household and industrial sewage pipes. All of these lines tend to incrust, mainly due to limescale from the water, rusting on the inner wall of the pipe, on excretions from the flow medium, on reaction products between the flow medium and carried substances as well as the pipe material, etc. and due to the combined effects.
• the aforementioned phenomena lead to leaks or very substantial Reductions in the pipe cross-sections, resulting in the transport of the flow medium disturbed, if not made impossible.
• the process for the rehabilitation of pipelines claimed here helps one to avoid complete renewal of the pipeline, which is particularly true in terms of completely installed sanitary facilities as particularly advantageous turns out.
• the pipes after removing the fittings more or less freely accessible so that the claimed cleaning and Coating process can be applied.
• the claimed process does not include an at least partial conventional repair of the pipelines off, so that complete pipeline networks are also partially renewed and can be partially renovated according to the claimed method.
• the known method also has the very considerable disadvantage that that there are leaks during the application of the method or during the Do not let the compressed air supply or as good as not be determined. Hence there is a risk that, despite enormous leaks, the inner coating is carried out, closing the leaks almost impossible is. In this respect, a large leak or a hole in the pipeline is caused Coating almost "refined" and can no longer be closed effectively will.
• the present invention is based on the object of a method for Refurbishment of pipelines indicate after which one with new pipelines comparable line quality with simple technical means and under Prevention of blockages due to detached interior coverings during treatment is achieved.
• the method according to the invention achieves the above object by Features of claim 1. Thereafter, the process for the remediation of Pipelines of the type mentioned are designed such that the abrasive due to a pressure gradient into the pipeline, due to an alternating one Pressure drop in the pipeline back and forth and ultimately due a pressure gradient between the two ends of the pipeline from the Pipeline is promoted out.
• the back and forth Moving the abrasive within the pipeline is carried out as long as until the pipeline is completely cleared of the inner linings, at least at least until the abrasive is unimpeded through the pipeline can flow through.
• the further "cleaning process" even without an alternating pressure drop simply specified pressure drop and the resulting promotion of the Reach abrasives through the pipeline.
• the abrasive due to a pressure differential between the conveyed both ends of the pipeline out of the pipeline, taking it can be a continuous process, namely on further abrasive agent sucked in from the pipeline at the inlet end or can be blown into the pipeline.
• the advantageous embodiment of the invention according to the invention Process the very significant advantage that the suction side generated Vacuum drops to the open end of the pipeline. Consequently, be Detached particles with decreasing distance to the outlet or vacuum side End more entrained, so that due to the outlet-side end setting pressure gradient blockages effective are avoided, because these decrease with increasing distance from the outlet side Towards the end to a greater extent be carried away or carried away. Finally leave determine leaks by the method according to the invention in that a lower vacuum in the event of a leak at the outlet end sets. If this drop in vacuum suddenly occurs, this allows for suddenly open a hole in the pipeline.
• the preheated one used to dry the pipeline Air is not simply extracted, but rather through a filter device sucked out of the pipeline or through the pipeline becomes.
• the filter device could be connected directly upstream of the compressor used for this purpose so that no separate equipment is required.
• the abrasive used to remove the inner linings could be particles of any type carried by flowing air, but which would have to be harder than the inner linings to be removed. It has proven particularly useful when renovating water pipes that the particles have a grain size in the range of 0.3 mm and 6 mm. A specific weight of more than 3.0 g / cm 3 has also been found to be advantageous, in which case air is used as the carrier medium.
• the abrasive particles could be corundum or quartz sand.
• the abrasive particles could also be designed as metal particles, in particular as ferromagnetic particles. Due to such particles, a subsequent magnetic separation of the abrasive particles from the detached inner coverings would be possible, which - as already mentioned - consist of rust and / or lime.
• the application of the coating agent and, on the one hand, good wetting with the inner wall of the pipeline and on the other hand a quick one subsequent curing is particularly favored in that the Pipeline after removing the inner linings to a temperature above room temperature lying temperature is heated. It has a temperature of about 40 ° C very well proven.
• the pipeline could in turn be heated by sucking through heated air, which is carried through the Pipe is sucked through until the desired end at the outlet end Temperature is reached. This could in turn be measured by the temperature drop between the inlet end and the outlet end of the pipeline detect. In any case, it is essential that the pipeline is heated up by Sucking through heated air and not by pushing through Compressed air takes place.
• the one used to heat the pipeline preheated air can also be extracted via a filter device, whereby this filter device also directly serves the suction compressor can be upstream.
• the heating of the Pipeline exclusively or additionally by one after cleaning and before the heating device sucked into the pipeline. So far the intake of heated air would not be absolutely necessary, if the capacity of the heating device sucked into the pipeline is sufficient.
• the heating device could be used for extremely long pipes Avoid cooling the air sucked in at the end, so that the Warm-up process is accelerated considerably.
• the heating device used for this could in a further advantageous manner as a heating wire, in particular as self-regulating heating wire.
• Such a heating wire could, for example. in the sense of resistance heating with ceramic insulation of the heating conductor be executed. Basically, however, all of them can be inserted into a pipeline or suction devices applicable.
• the heating wire becomes more advantageous Way - before the inner coating - pulled out of the pipeline.
• the heating wire could both from the inlet end and from the outlet side, i.e. vacuum end are pulled out, in the latter case, the power connections are released on the inlet side ought to.
• the coating material is then introduced into the heated pipeline, a negative pressure is also generated here on the outlet side. Because of this negative pressure the coating material is mixed in with the ambient air the pipe is sucked in, due to the different viscosity between air and the coating material the viscous coating material is pressed against the pipe wall and wets it there.
• the pressure difference required for drawing in the coating material is generated exclusively by the vacuum on the outlet side.
• the coating material can contain embedded fibers, in particular short fibers, which are particularly useful here can advantageously be glass fibers. These glass fibers would due to the irregularly designed outlet openings, hook and the viscous coating material a sufficient hold mediate to plug the leakage. In this respect, at least small ones Seal holes and repair leaks.
• the method according to the invention could be used at the end Vacuuming the free end of the pipeline is at least temporarily closed, any leaks via the gradually occurring negative pressure are detectable. If hardly any negative pressure is reached, this indicates that the problem is to be remediated Pipe system has a very significant leakage.
• an optical could Means for inspection of the pipeline or for quality control of the inner coating can also be sucked into the pipeline.
• a towing system could be used as an aid.
• the medium could be an optical fiber line, which on the one hand spend light in the pipeline and on the other hand reflect there Light rays can lead out of the pipeline. Fiber bundle or different fiber optic cables with different tasks be provided.
• the optical means comprise a type of endoscopy device, i.e. one in the Miniature camera with suitable lighting and lighting even with miniaturized, remote-controlled tools for sampling or the like ..

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Pipeline Systems (AREA)
• Cleaning In General (AREA)
• Rigid Pipes And Flexible Pipes (AREA)
• Forging (AREA)
• Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
• Earth Drilling (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=6526645

Family Applications (1)

Country Status (14)

Families Citing this family (34)

Family Cites Families (27)

• 1994
  • 1994-08-29 DE DE4430334A patent/DE4430334A1/de not_active Withdrawn
• 1995
  • 1995-08-29 CZ CZ1997581A patent/CZ293551B6/cs not_active IP Right Cessation
  • 1995-08-29 PL PL95318906A patent/PL178885B1/pl not_active IP Right Cessation
  • 1995-08-29 AT AT95928996T patent/ATE173424T1/de not_active IP Right Cessation
  • 1995-08-29 EP EP95928996A patent/EP0777551B1/de not_active Expired - Lifetime
  • 1995-08-29 DE DE19580923T patent/DE19580923D2/de not_active Expired - Fee Related
  • 1995-08-29 WO PCT/DE1995/001152 patent/WO1996006710A1/de active IP Right Grant
  • 1995-08-29 DE DE59504280T patent/DE59504280D1/de not_active Expired - Lifetime
  • 1995-08-29 HU HU9701242A patent/HU219114B/hu not_active IP Right Cessation
  • 1995-08-29 RU RU97104921/02A patent/RU2152272C1/ru not_active IP Right Cessation
  • 1995-08-29 SK SK187-97A patent/SK18797A3/sk unknown
  • 1995-08-29 AU AU32529/95A patent/AU3252995A/en not_active Abandoned
  • 1995-08-29 JP JP8508412A patent/JPH10505285A/ja active Pending
  • 1995-08-29 US US08/793,557 patent/US5924913A/en not_active Expired - Fee Related
• 1997
  • 1997-02-18 BG BG101243A patent/BG62797B1/bg unknown
  • 1997-02-25 NO NO970835A patent/NO970835L/no unknown

Also Published As

Similar Documents

Legal Events